Enzymatic displacement of oxygen and sulfur from purines.
D000619:Aminohydrolases; D055598:Chemical Phenomena; D002621:Chemistry; D009705:Nucleosides; D010100:Oxygen; D010103:Oxygen Isotopes; D011687:Purines; D013455:Sulfur
D009705:Nucleosides; D010103:Oxygen Isotopes; D011687:Purines; D013455:Sulfur; D000619:Aminohydrolases; D010100:Oxygen